Wrist pin for mowing machines



Jan. 24, 1928.

O D TEEL WRIST PIN FOR MOWING MACHINES INVENTOR 0D ZI eZ Filed Feb. 16, 1927 mm 1! :1ililllllllllllllllnuu kTTGRNEY till Patented. Jun 24-, 15328.

ric

O I) TEEL, O1 ECHO, OREGON.

WRIST PIN FOR MOYVING MACHINE$.

Application filed February 16', 1927.

This invention relates to a wrist pin intended primarily for mowing machines, although it may be applied to other machinit constitutes an improvement on my 1,. ions Patent No. 1,579,969.

The object of the invention is especially to provide a device oflhis character wherein the wrist pin may e firmly and securely fastened to the crank disk in such a manner as to prevent the wrist pin from turning relative to the crank disk.

Another object of the invention is to provide a construction so the wrist pin may be readily assembled with and taken from the crank disk. In this way the replacement of worn wrist pins is greatly facilitated.

it further object is to provide a device of the character specified having the advan tages and capacities mentioned and which is simple and durable in construction, reliable and etiicicnt in operation and easy and coinparatively inexpensive to mumifacture.

@ther objects and advantages reside in certain novel features of construction, arrangements and combinations of parts which will. be hereinafter more fully described and particularly pointed out in the appended claims. reference being had to the accompanying drawings forming a part of this spcciiicetion, in which:

fhigure l is a plan view taken from a position looking down on the end of the wrist pin and side of the crank disk assembled topcther,

Figure 2 is a side elevation of the same construction,

Figure 3 a side view of the unassembled wristpin,

Figured is a perspective view of the flat taper key,

Figure 5 Sl'lOWS a side elevation of crank disk assembly turned 90 from position shown in Figure lfloil'erring to the d rawings, numeral l desiginrtcs the crank wheel. or disk of a mowing machine which has the usual. hub 23 projecting laterally therefrom. This disk isflormed with an opening 5 in the hub 2 adapted to provide a mounting for the wrist pin designated generally at 4. The wrist pin t has a main portion 5 on which the pitinan. eye 6 is to be fastened by means of a nut and washer T and 8. The mounting portion 9 of the wrist pin 4. is fitted in the opening 3 of the crank disk and the end portion of?) projectsheyond the disk and lies adjathe the Serial No. 168,721.

,ting therein in driven relatimi. The kcyway 10 is in a somewhatangular position 1n respect to the axis of the shaft although the angle is not a large one. The walls of this keyway are made preferably slightly tapered, in conformity with the taper of the key. The longer dimension of the key is preferably across the diameter of the shaft.

The key 11 is made preferably as shown in Figure 4, that is, having a tapered portion 12 on one side and a slit 13 in its lower end to provide a certain springiness. The opposite side or edge of the key 11 is straight as indicated at l t to frictionally engage a flattened surface 15 formed on the hub 2 in opposed relation to the keyway 10 in the wrist pin.

In operation, the various elements are assembled together as shown in Figure 2, the key being interposed. between the flattened surface 1% and the end 9 of the wrist pin is driven through the shaft keyway, which inclines toward the disk, until the lower end of the key impinges on the side of the disk. As the key is driven home its tapered edge 12 riding over the tapered wall of the keyway is forced laterally, wedginp; its straight edge 15 against the flattened surface 14:.

The wrist pin is by this means held securely in abutment to the disk, but may be easily disassembled therefrom when required. 7

I claim 2*- 1. In combination with a crank disk having a hub and an opening, a wrist pin having a mounting; portion titled in the opening of the crank disk and projecting beyond the crank disk and over the hub, a fastening device comprising a keyway through the wrist pin and a key therethrough, said key inuiiingiug on the side of the crank disk adjacent to the key.

2. In coi'nbination with a crank disk having a hub and also having an opcn'uipadaptcd to receive a wrist pin, a wrist pin having; a mounting portion fitted in the opening of the crank disk and having a portion extending beyond the crank disk and disposed adjacent the hub and a rectangular keyway loo therethrough, said keyway inclined at a slight angle toward the crank disk, a tapered l is key therethrough sufiiciently long to permit a substantial port-ion of its end to impinge upon the eranlc disk when driven into the keyway.

In eoi'nbination a fiat body having an opening, a pin insertable in the opening with one end projecting beyond one face of the body and having a transversely extending and obliquely disposed keyway, and a key insertable in the keyway with one end bindingly engaging the flat body to secure the pin and bod together.

4-. A wrist pin having a mounting portion and an extending portion, said extending portion being pierced by a substantially rectangular lceyway, the longer dimension of which lies across the shaft, said keyway being slightly inclined.

In combination a rotatable element having a laterally extending projection upon one side and provided with a flat surface, a wrist pin passing through the rotatable ele- 7. in combination a wrist pin insertable through an opening in a body and having a transverse keyway extending atan oblique angle with respect to the longitudinal axis of the wrist pin, and a key insertable in the lreyway with one end adapted to hindingly engage the body to secure the wrist pin to the latter.

0 D TE EL. 

